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Physics · Wave Optics

JEE Main 2026 — 5 April, Morning Shift — Question 12

In Young's double slit experiment using monochromatic light, the fringe width of the interference pattern produced on the screen is 2.4 μm. If the experiment is carried out in another medium having refractive index 1.2, the fringe width will be ______ μm.

  1. Option A:

    1.2

  2. Option B:

    2

    Correct
  3. Option C:

    2.4

  4. Option D:

    2.88

Answer: B

Step-by-step solution

Fringe width β′=β/μ=2.4/1.2=2\beta' = \beta/\mu = 2.4/1.2 = 2 μm.

Answer key and solution verified before publishing.

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Exam
JEE Main 2026
Paper
5 April, Morning Shift
Subject
Physics
Chapter
Wave Optics
Topic
Young's Double Slit Experiment and Its Modifications
In Young's double slit experiment using monochromatic light, the… | JEE Main 2026 PYQ with Solution · DhiX AI